22431132 has 36 divisors (see below), whose sum is σ = 56871360. Its totient is φ = 7454592.

The previous prime is 22431127. The next prime is 22431133. The reversal of 22431132 is 23113422.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22431133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14869 + ... + 16307.

It is an arithmetic number, because the mean of its divisors is an integer number (1579760).

Almost surely, 2^22431132 is an apocalyptic number.

It is an amenable number.

22431132 is an abundant number, since it is smaller than the sum of its proper divisors (34440228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22431132 is a wasteful number, since it uses less digits than its factorization.

22431132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882 (or 1877 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 22431132 is about 4736.1516023033. The cubic root of 22431132 is about 282.0224819861.

Adding to 22431132 its reverse (23113422), we get a palindrome (45544554).

It can be divided in two parts, 2243 and 1132, that added together give a cube (3375 = 15³).

The spelling of 22431132 in words is "twenty-two million, four hundred thirty-one thousand, one hundred thirty-two".